225 ILCS 745/65
The expiration date and renewal period for each license shall be set by rule. A Licensed Professional Geologist whose license has expired may reinstate his or her license or enrollment at any time within 5 years after the expiration thereof, by making a renewal application and by paying the required fee. However, any Licensed Professional Geologist whose license expired while he or she was (i) on active duty with the Armed Forces of the United States or called into service or training by the State militia or (ii) in training or education under the supervision of the United States preliminary to induction into the military service, may have his or her Licensed Professional Geologist license renewed, reinstated, or restored without paying any lapsed renewal fees if within 2 years after termination of the service, training, or education the Licensed Professional Geologist furnishes to the Department satisfactory evidence of the service, training, or education and that it has been terminated under honorable conditions.
Any Licensed Professional Geologist whose license has expired for more than 5 years may have it restored by making application to the Department, paying the required fee, and filing acceptable proof of fitness to have the license restored. The proof may include sworn evidence certifying active practice in another jurisdiction. If the geologist has not practiced for 5 years or more, the Board shall determine by an evaluation program established by rule, whether that individual is fit to resume active status as a Licensed Professional Geologist. The Board may require the geologist to complete a period of evaluated professional experience and may require successful completion of an examination.
The Department may refuse to issue or may suspend the license of any person who fails to file a tax return, or to pay the tax, penalty, or interest shown in a filed return, or to pay any final assessment of tax, penalty, or interest, as required by any tax Act administered by the Illinois Department of Revenue, until such time as the requirements of any such tax Act are satisfied.
225 ILCS 745/65